Comment I used the new system this year (Score 3, Interesting) 90
In past years I'd used the freefillable forms option, and before that TaxAct (back when it wasn't constantly nagging you to buy much more expensive options). Our taxes are pretty straightforward nowadays, since our house is paid off and the "kid" is an adult. We were under the earnings limit they've placed on the new system, and we live in Washington state - so I figured I'd give it a try.
This is much more user-friendly than freefillableforms, and is superior in usability even to TaxAct.... but not being able to handle itemized deductions (at least not yet) will make it a non-starter for many people. But all in all they did a good job. Filing is free, and there was no fee for paying what we owed via our bank account (unlike, say, with TaxAct). I definitely will use it again next year, if the Publicans don't manage to kill it.